Platen-shift for type-writing machines.



O. IB JTERIVLMUQ.v PLATBN SHIFT FOR TYPE WRITING MA GHINES.

APPLICATION FILED 0GT.14. 1911.

Patented Dec. 15,1914;

2 SHEETSSHEET l.

r 8 Wm wtoz 0&5? Peiermann $31 513 mumm 0 PETERMANN PLATEN SHIFT FOR TYPE WRITING MACHINES.

APPLICATION FILED 00114. 1911.

l 1 21 ,ML Patented Dec. 15, 1914.

2 BHBETFSHBBT 2.

3 Wm "$06 0550 sarmwnn UNITED STATES, PATENT oFFIcE.

OTTO PETERMANN, OF GROTON, NEW YORK, ASSIGNOR TO CORONA TYPEWRITER COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

PLATEN-SHIFT FOB TYPE-WRITING MACHINES.

Specification of Letters Patent. Patented Dec. 15, 1914.

Application filed October 14, 1911. Serial No. 654,758.

To all whom it may concern Be it known that I, OTTO PEIERMANN, a

citizen of the Republic of Switzerland, and,

a resident of Groton, county of Tompkins, and State of New York, have invented certain new and useful Improvements in Platen-Shifts for Type-\Vriting Machines, of which the following is a full, clear, and exact description.

This invention relates more particularly to the platen shift mechanism of visible or front strike typewriting machines in which the carriage and platen are adapted to be folded into overhanging relation to the keyboard or otherwise shifted or moved into compact relation to another part of the machine when not in use.

One of the main objects of the invention is to provide simple mechanism which is so connected to the carriage that the said carriage may have a direct vertical shifting movement and is operated in such a way that both ends of the carriage will be moved uniformly and thus maintained in its shifted positions.

Other objects of the invention are to provide simple means whereby the platen and carriage may be elevated to different extents by a plurality of levers located at one side of the machine so as to adapt the type heads or blocks to have a plurality of characters thereon; to provide means whereby the carriage support may be so made that the carriage and platen may be folded forward out of normal. working position or otherwise shifted or moved from such position into compact relation to another part of the machine: and to provide simple means whereby either of the shift levers may be locked when depressed.

Another object of the invention is to provide means between the carriage and the shift levers which will form a rigid and effective frame and which is so connected to the levers that a positive and uniform movement may be given to the carriage and support.

- A further object of the invention is to provide means extending transversely of the machine and so arranged that the shifting movementof the carriage will be positively limited by engagement with elements located at opposite sides of the machine in order that proper alinement and adjust ment of the carriage may be secured.

v A still further object of the invention is to provide a shift lever havinga positive connection with the carriage, and an independent lcver operatively connected to the carriage and adapted in addition thereto to operate an element which is so arranged that it will limit the shift movement of said independent lever.

\Vith these and other'objects in View, the invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part'of this specification, and will then be pointed out in the claims at the end of the descriptioii.

In the drawings, Figure 1 is a longitudi nal section, partly in elevation, of a machine showing one form of mechanism embodying my invention applied thereto' Fig. 2 is a transverse section, partly in elevation, taken on the line IIII of Figs. 1 and 3, the platen and carriage being removed. Fig. 3 is afragmentary sectional plan, taken on the line IIIIII of Fig. 2.

Fig. 4 is a detail fperspective view of a bar forming a part 0 the means for changing the extent of shifting movement of the platen carriage. Fig. 5 is a detail perspec-' tive view of one of the shift levers. Fig. 6 is a detail perspective view of one of the brackets located near each rear corner of the frame and serving as a support for the bar shown in'Fig. 4:. Fig. 7 is a vertical section taken on the line VIIVII of Fig. 1. showing the locking means for the shift levers in elevation and only one of said shift levers; and Fig. 8 is a section on the line VIII-VI'II of Fig. 3, showing one means for counterbalancing the weight of the carriage.

While I show and shall describe the in- I vent-ion as applied to a type of machine such as set forth in the patent to F. S; Rose, No. 754,242, issued March 8, 1904, in which the carriage and platen are adapted to fold forward over the keys, it will be understood that the invention may be applied to typeand each slide is secured to a ar 15 forminga art of a support 16. The bars 15 are .pivotally held at theirforward ends, as at 17, to the bars 18, the latter normally resting when the lower case type are used upon the upper edge of the frame. The bars 18 have a carriage'hed 19 extending across the machine to which bars said bed is fixed, and adapted to "move lengthwise of the bed is a carriage 20 in which is mounted the platen 21. The bars 18, together with the carriage and platen are adapted to be folded forward on pivots 17 so that the platen may rest in the concave portions 22 of the frame sides 11. The parts thus far described may be of the usual or of any preferred construction.

A rod or bar- 23 extends transversely of the machine between the sides 11 of the frame and this. bar may be solid or tubular, as preferred, and engaging the ends of said rod are screws 24 and 25. The screws24t and 25 have tapered ends engaging apertures or, recesses in the ends of the rod 23 to serve as pivots for the rod, and either or both of said screws, as for example the screw 25, may have a. lock nut 26 arranged thereon to permit the screw to be adjusted and locked in such adjusted position. The rod 23 has an arm 27 secured thereto on one side of the machine and to the other end of said rod is secured a shift lever 28. The arm 27 and the lever 28 have elongated openings 29 at their rear ends through which a transversely extending rod 30 passes, the said rod being rigidly secured to the lower ends of the slides or members 14 to rigidly hold said slides or members spaced apart. At theupper part of the machine adjacent to the slides 14 is a transversely extending rod 31, the ends ofwhich abut against the rear ends of the supporting bars 15 and are rigidly secured thereto by means of screws 33, the ends of which pass through apertures in the bars 15 and engage threaded apertures in the ends of said rod. The rods 30 and 31, together with the slides 14: and the bars 15 form a rigid and substantially rectangular frame which. prevents lateral or other twist to be given to the support 16, thereby serving to hold and rigidly guide the support and carriage when in the position shown in Fig. 1 or in either of its shifted positions. When thus constructed the openings through the posts or brackets 13 and 1.3 need not be of the same size throughout, and one of the posts, as the post 13 may be nocessed or counterbored for the greater part: of its length so that the slide 14. will be positively guided at the upper end only thereof, while the post 13 5 may be similarly counterborcd and have an elongated opening large enough to. permit opening 37 is engaged by the slide 14 to have a limited free movement therein transversely of the machine only in any preferred form of button or key 3i to adapt the lever to be depressed and thereby rock the rod 23 and elevate the slides or members 1 1 and the parts connected thereto. A second shift lever 35 has a button, key or finger part 35 and is pivoted loosely upon a reduced portion 36 o 23, and said lever has a threaded opening 37 Fig. 5, located adjacent to the rod 23. This the threaded end of a screw 38 the body of which passes through a slot 39 in the shift lever 28, the head of said screw serving to hold the two levers together, and the slot permitting an independent movement of the lever 28 with respect to the shift lever 35. The lever 35 has an enlarged inner end 39 in which is a vertically arranged slot 39 through which the end of the rod 30 passes. This slot permits a limited movement of the rod 30 when the lever 28 is depressed without operating the shift lever 35, the rod' 30 normally resting in the lower portion of said slot 39*. As soon as the lever 35 is depressed the rod 30 will move the slides or members 14 and through them the carriage and platen, though instead of the lever 35 moving the rod direct, it might do sothrough the lever 28 and screw 38. In this latter case if the lever 35 is depressed the screw 38 will engage the bottom of the slot 39 of the lever 28 and depress said lever 28 also and consequently shift the rod 30 and the platen, the said slot 39 permitting the lever 28 to have an independent movement as previously described. A spring 39 yieldingly holds the shift lever 35 in its normal position. This spring 39 is held at one end to a laterally projecting and integral lug 39 at one end and at its other end is held to a pin 35, the inner end. of said lever 35 normally resting against said pin.

To limit the vertical shift movement of the platen and carriage and to maintain the the transverse rod carriage in its proper position when shifted,

various means may be employed. As shown, a bracket 40 is secured to the rear frame plate 1.2 adjacent to each of the lower rear corners of the frame, and supported in said brackets to move transversely of the machine is a stop bar or element 41. Each bracket 40 has a vertical securing part 42 which may be held by screws 43, or otherwise, to

the frame plate 12. The brackets 40 each have a vertical guiding portion 44 pro'vided with a vertical open ended slot 4.5 in which the ends ofthe rod 30 are guided. By means of these slots 45 acting as guides, and by arranging the parts in the manner shown, the frame formed by the slides 14 and the transversely extending rods 30 and 31 may have a positive and uniform vertical movement in the posts or brackets 13 and 13 and consequently a similar movement given to the carriage and to the platen.

The brackets have slots 46 to receive the reduced ends 47 and 47 of the stop bar 41 in such a way that the said bar may have a limited lengthwise movement between said brackets, though it will be understood that the bar 41 may be of the same width throughout its entire length. Each bracket has an opening 48 and a horizontally extending plate portion 48* and said openings 48 of the brackets are adapted to register with openings 49 located at the opposite ends of the bar 41, when the latter is in its normal position, said bar being also provided with openings 50 located adjacent to the openings 49. The bar 41 is normally yieldingly held by a spring 51 to cause the openings 48 and 49 to register one end of said spring being fastened to a screw 52 on the bar 41 and the other end to a screw 53 on one of the brackets 47. This bar 41 has a beveled or cam portion, as 54, on the end 47 and this end is adapted to be engaged by the beveled or cam edge 55, of the shift lever 35.

The rod 30 has stops, elements or devices- 57 and 58 rigidly held thereto. The stops 57 are normally in alinement with the open-v ings 49 of the bar 41 and openings 48 of the brackets 40. and the stops 58 are normally in alinement with the openings 50 in said bar 41. These stops 57 and 58 are in the form of screws in order that the same may be adjustable, and said stops have plain pinlike portions 59 in order that the same may readily pass into openings in the bar 41 and brackets. The stops 5'7 are relatively longer than the stops 58, and each stop may be held in its adjusted position by a nut 60.

As will be seen when the lever 28 is operated the positive connection between said lever and the rod 30 will elevate the carriage and as the openings 48 and 49 are normally in alinement. the ends 59 of the stops 57 will enter said openings until the ends of the stops 58 in passing through the openings 5O of the bar 41 engage the under surface of the horizontal plate portion 48 of the brackets 40, thus permitting the platen and carriage to have its greatest shift movement. the pin-andslot connection between the shift levers 28- and 35 permitting the lever 28 to be thus operated without moving the lever 85. If the lever 35 is operated the cam end 55 will impart a lengthwise movement to the bar 41 to force the openings 49 to one side of the openings 4-8 of the brackets 40 and cover said latter openings by a solid part of the bar, and at the same time said lever 35 will move the rod 30 to elevate the carriage. This move" ment, however, will be limited by the ends 59 of the stops 57 engaging the solid part of the bar 4-1, the said bar 41 being restored to its normal position by means of the spring 51. By reason of the stops 57 and 08 and the shift lever 28 and arm 27 be ng located at opposite sides of the machine, an effective and uniform adjustment of the parts are secured.

The carriage and platen may return to the position shown in Fig. 1 for the lower case type by gravity, and the weight of the carriage and other parts may be com: pensated for by a spring 61. one end of which is secured to :1. lug 61 projecting from the lower edge of the arm 27, and the other end of said spring fastened to the end of an adjustable threaded rod 62. This rod is held to a bracket 62 located above the arm 27 and held by a screw or otherwise to the inner side of the machine frame. A thumb nut 62 is arranged on the outer end of the threaded rod 62 by which the tension of the spring (51 may be varied, said spring tending normally to force the rod 30 and platen carriage upward.

. A locking lever 3 may be pivoted at 64 to one of the sides 11 of the frame and said lever may have a. p nger portion 65 projecting on opposite si es of the body thereof and adapted to engage a part of the frame to limit its movemept in either direction. This level-may have a part or projection 66 located on the part (57 of said lever which is adapted to enter recesses (38 and 69 formed in the lower edges of the shift levers 28 and This lever is in?- tended to lock either of the shift levers in their depressed positions so that the carriage and platen may be positively held to adapt either the upper case or figures or like characters to be used as is common in machines of this kind. The shift lever has a projection 70 extending to one side of the body portion thereof, and this projection is adapted to be engaged by a lug 71 on the locking lever 63. It will be seen that if the locking lever is moved so that the projection or lug 71 engages the projection or lug 70 of'the shift lever 28. the latter lever cannot be moved and consequently the shift lever 35 will be also looked. while in the position shown either shift lever may be operated and locked in its depressed position by the part or projection ('36, for in this position the projec tions 70 and 71 will not interfere with each other.

From the foregoing. it will be seen that simple and efficient means is provided whereby the carriage and platen may be shifted vertically to adapt the type heads or blocks to have a plurality of characters thereon: that said carriage is rigidly supported so carriage is rigidly held and forms a sub-.

stantially rectangular rigid frame that simple means is provided whereby a uniform vertical movement may be givento the carriage and platen and the shifting movementof the carriage limited from both sides of the machine; that said means is readily accessible for repairs or for other purposes, and that said mechanism may be. cheaply made and easily assembled. Y

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a typewriting machine, the combination of a support, a platen mounted to move along said support, two platen shift levers located in close relation and on the same side of the machine and so connected that one may haveian independent movement'with relation to the other, means connected directly to one of the levers and adapted to be operated by both of said levers whereby the platen. may be shifted vertically, a transversely extending element having a lengthwise movement and independent of said levers, means for supporting said element at opposite sides of the machine, said element being adapted to be operated by one of the levers, and means movable with the levers and adapted to engage said element to limit the shifting movement of said levers.

In a typewriting machine, the combination of a support, a platen mounted to move along said support, two platen shift levers located in close relation and on the same side of the machine and so connected that one may have an independent movement' with relation to the other, means connected directly to one of the levers and adapted to be operated by both of said levers to shift the platen, a transversely eX- tending and reoiprocatory element having a lengthwise movement and independent of said levers, means for supporting said element, said element being adapted to be 0perated by one of the levers only, and means bodily movable with the levers and adapted to engage said element to limit the shifting movement of said levers.

3. In a typewriting machine, the combination of a support, a platen mounted to move along said support, two platen shift levers. atransversely extending element having a lengtlnvise movement and independent of said levers, means for supporting said element, said element being adapted to be voperated by one of the levers, and means bodily movable by the levers and adapted to engage said element to limit the shifting movement of said levers.

t. In a typewriting machine, the combination of a support, a platen mounted to move along said support, two leversadapted'to impart shift movements of different extents to said platen, an element having a lengthwise movement, means for supporting said element at opposite sides 0-- the machine, said element being independent of said levers and adapted to be operated by one ofthe levers only, and means movable by both of said levers and adapted to engage 'said element to limit the shiftlng movement of said levers and the platen.

In a typewriting machine, the combination of a support, a carriage movable along said support, a platen mounted in the carriage, two shift-levers arranged in close relation and located on the same side of the machine, a transversely extending rod adapted to be moved by said levers,

and a. transversely extending bar cooperating with said rod to limit the shifting movement of said platen.

.6, Ina typewriting machine, the combination of a support, a carriage movable along said support, a platen mounted in the carriage, two 'shiftlevers, a transversely extending rod adapted to be moved by sald levers, stops carried by said rod, and a transversely extending bar cooperating With said stops to limit the shifting movement of said platen. Y i

7. .In a typewriting machine, the combination of a support, a carriage movable along said support, a platen mounted in the carriage, two shift levers, a transversely extending rod adapted towbe moved by said levers, stops of relatively different lengths carried by said rod and located on opposite sides of the machine, and a transversely extending bar cooperating With said stops to limit the shifting movement of the platen.

8. In a typewriting machine, the combination of a support, a carriage mounted to move along said support, a platen mounted in the carriage, a plurality of shift levers,-

relatively different lengths movable by the.

shift levers, and means cooperating with the stops to limit the shift movement of the platen.

10. In a typewriting machine, the combination of a support, a carriage movable along said. support, a platen mounted in the with the levers and adapted to engage said element to limit tlie shifting movement of the platen.

s 12; In a typewriting machine, the combination of a support, a platen mounted on said support, a shift lever, a transversely extending and movable bar, and means cooperating with the lever and adapted to en- 7 gage said bar to limit the shifting movement of the platen.

13. In a typewriting machine, the combination of a platen, a shift lever, a bar having a limited lengthwise movement transversely of the machine, and means cooperating with said lever adapted to move free of said bar in one of its positions and to engage the same in another position to limit .the shifting movement of the platen.

ll. In a typewriting machine, the combination of a support, a carriage mounted to move along said support, a platen mounted in the carriage, two shift levers having limited and relatively different movements and located at one side of themachine, two vertically movable slides located at opposite sides of the machine and connected to move the carriage, rods located at the upper and lower part of the machine and rigidly holding the slides spaced apart and forming therewith a substantially rectangular rigid frame, posts located at the rear corners of the machine and serving to guide the slides, and means cooperating with the levers to limit the vertical movement of the carriage.

15. In a typewriting machine, the combination of a support, a carriage mounted to move along said support, a platen mounted in the carraige, two movable slides located at opposite sides of the machine and connected to move the platen, rods located at the upper and lower part of the machine and rigidly holding the slides spaced apart and forming therewith a substantially rigid frame, and means for moving the slides.

16. In a typewriting machine, the combination of a support, a carriage mounted to move along said support, a platen mounted in the oarraige, two ertically movable slides located at opposite sides of the machine and connected to move the platen, rods located at the upper and lower part of the machine and rigidly holding the slides apart and forming therewith a. rigid frame, posts located at the rear corners of the machine through which the slides pass, and means for moving the slides. Y

17! In a typewriting machine, the combination of a support, a carriage mounted to move along said support, a platen mounted in the carriage, two shift levers having limited and relatively different movements, vertically movable slides located at opposite sides of the machine and connected to move the platen, rods located at the upper and lower part of the machine and rigidly holding the slides spaced apart and forming therewith a substantially rectangular rigid frame, means for guiding the slides, and means cooperating with the levers to limit the shifting movement of the platen.

18. In a typewriting machine, the combination of a support, a carriage, a platen mounted in the carriage to move along the support, verticallyhnovable slides connected to move the carriage, a rod extending transversely of the machine and rigidly connected to the lower part of the slides, brackets held to the rear part of the machine frame,

a bar supported to have a limited lengthwise movement in said brackets, means mounted upon the rod and cooperating with the bar and brackets to limit the vertical movement of the slides and carriage, a lever pivotally held at its inner end to the rod, anda second lever havinga cam end adapted to move the bar When depressed.

19. In a typewritmg machine, the combination of a support, a carriage, trplaten mounted in the carriage to move along the support, slides connected to move the platen, a rod extendingtransversely of the machine and rigidly connected to the lower part ofthe slides, brackets held to the rear part of the machine frame, a bar supported to have a limited lengthwise movement in said brackets, means mounted upon the rod and cooperating with the bar to limit the movement of the slides, a lever pivotally held at its inner end to the rod, and a second lever adapted to move the bar when depressed.

20. In a typewriting machine, the comhination of a support, a carriage movable along the support, a platen mounted in the carriage, brackets held to the rear part of the machine frame, a bar supported to have a limited lengthwise moven'ient in said brackets, a shift lever, and a second shift lever having a cam end adapted to move the bar when depressed to limit the shift movement of the platen.

21. In a typewriting machine, the combination of a support, a carriage adapted to move along the support, a platen mounted in 12 said carriage, a rod extending transversely of o the machine and connected to move with the platen, brackets held to the rear part of the machine frame, a bar supported to have a limited lengthwise movement in said brackets, means mounted upon the rod and cooperating with the bar and brackets to limit the shift movement of the platen, a lever pivotally held at its inner end to the rod, and\ be operated by one of the levers, a spring normally forcing the bar, in one dII'ECHOII,

said 7. bar and brackets having openings adapted normally to-register and the openings of said brackets being adaptedtobe covered when the bar is moved, and two adjustable stops of relatively. different lengths held to the 'rod near each end thereof and adapted to pass through the openings in the bar and brackets when one of the levers is operated, one of said stops being adapted to engage the solid part of said bar when the other lever is operated.

2.3. In a typewriting machine, the combination of a support, a carriage adapted to move along said support, a transversely extending rod, connections between the rod and support, two levers, one of which is movable independently of the rod and the other directly connected thereto to impart movement to said rod, brackets located at the rear corners of the machine, a bar having a lengthwise limlted movement in said brackets transversely of the machine and adapted to be operated by one of the levers, said bar and bracket having openings adapted normally to register and the openings of said brackets being adapted to be covered when the bar is moved, and two stops of relatively different lengths held to the rod and adapted to pass through the openings in the bar when one of the levers is operated, one of said stops being adapted to engage the solid part of said bar when the other lever is operated.

24. In a typewriting machine, the combination of a support, a carriage adapted to move along said support, a transversely extending rod, two levers connected to the rod to impart movement thereto, brackets located at the rear of the machine, connections between the'rod and carriage, a bar having a lengt wise limited movement in said brackets tr nsversely of the machine and adapted to be operated by one of the levers, a spring normaly forcing the bar in one direction,

vsaid bar and brackets having openings *adapted normally to register and the openings of said brackets being adapted to be covered when the bar is moved, and two adjustably held screws of relatively dliferent lengths held to the rod near each end thereof and adapted to pass through the openings 1n the bar and brackets when one of the levers is operated, one of said screws belng adapted to engage the solid part of said bar when the other lever is operated.

25. In a, typewriting machine, the combination of a support, a carriage adapted to move along said support, a transversely extending rod, two levers, brackets located at the rear corners of the machine, connections between the rod and carriage, a bar having a lengthwise limited movement in said brackets transversely of the machine and adapted to be operated by one of the levers, and two screws of relatively different lengths held to the rod near each end thereof and adapted to cooperate with the bar and limit the shift movement of the levers.

26-. In a typewriting machine, the combination of a support, a carriage adapted tomove along said support, two vertically movable slides, a rod normally holding the slides spaced apart at the lower portion thereof, a shift lever having its inner end slotted to receive the rod and adapted to elevate said rod, a second lever having a -pin-and-slot connection with the first-m en tioned lever and having its rear end slotted to receive the end of the rod and permit said rod to have a movement independent of said lever when operated by s'aidfirst-mentioned lever, said second lever being adapted also to directly operate said rod, a bar having a cam end adapted to be given a lengthwise movement by said second lever, and means cooperating with said bar to limit the shifting movement of the levers and consequently thecarriage. I

27. In a typewriting machine, the combi nation of a support, a carriage adapted to move. along said support, two vertically movable slides, a rod normally holding the slides spaced apart at the upper and lower end opposite the shift levers and. connectedto the first-mentioned rod, a bar having a cam end adapted to be given a lengthwise movement by the cam portion-of said second said second lever being lever, and means cooperating with said bar to limit the shifting movement of the levers and consequently the carriage.

28. In a typewriting machine, the combination of a support, a carriage adapted to move along said su port, two vertically movable slides, a shii t lever having its inner ends slotted and adapted to elevate the slides, a second lever also adapted to operate the slides and having a pin-and-slot connection with the first-mentioned lever and having itsrear end provided with a beveled cam portion, a bar having a cam end adapted to be given a lengthwise movement by the cam portion of the second lever, and means cooperating with said bar to limit the shifting movement of the levers and consequently the carriage.

29. In a typewriting machine, the combination with a support, of a carriage mounted to move on said support, a platen held to the carriage, two shift levers, a trans versely-extending rod connected to be operated by said levers, means connecting the rod to the carriage to move the latter, two brackets located at the lower'rear part of the machine at opposite sides thereof, and havin a vertical guiding portion and a plateike portion provided with an opening, also with slots, a bar having reduced ends and having a limited movement in said slots of the brackets by engagement with .one of the levers, said bar being provided with two openings near each end, one

of which is normally in alinement with the opening in each bracket, a spring normally forcing the bar in one direction, two adjustable stops of relatively different lengths adapted normally to enter the openings in the bar and bracket to limit the movement of the carriage at both sides of the machine when one of the levers is depressed and to impart a diflerent movement to said carriage, when the other lever is depressed, by engagement of one of the stops with a solid portion of said bar.

30. In a typewriting machine, the combination of a support, a carriage mounted to move on said support, a platen held to the carriage, two shift levers, .two brackets located at the lower rear part of the machine at opposite sides thereof, and having a vertical guiding portion and a plate-like portion provided with an opening, also with slots, a bar having reducedends and having a limited movement in said slots of the brackets, said barbeing provided with two openings near each end, one of which is normally in alinement with the opening in each bracket, a spring normally forcing the bar in one direction, means for shifting said one of said er portion are to limit its movement in either direction and having a projection adapted to engage the. recess of either shift lever to lock the seine m a depressed-position, and having alsopa prm jection ada ted to-engage the project on of levers to lock both of said levers against movement. 32.- In a typewriting machine, the comb1- nation of a support, a platen carriage mounted on said support, two platen shift levers,

one of which has a projecting part, and a' pivoted locking lever having a finger POI? tion adapted to engage a part of the support to limit its movement in either direction and having a projection adapted to engage the projection of one ofsaid levers to lock both" ofsaid levers against movement.

33. In atypewriting machine, the combi-' nation of asupport, a platen carriage mount-- ed on said support, two platen shift levers,

each'provided with a recessed portion, one

of whichhas a pro'ectiug part and a pivoted locking'lever having a firiger portion adapted to engage a part of the support to limit its movement in either direction and having a projection adapted toengage the projection ofoone of said leversto lock the same against movement.

, 34. In a typewriting-machine, the combi-f,

nation of a support, a platen carriage mounted on said support, two platen shiftlevers, and a pivoted locking lever having a projection adapted to engage either shift lever to lock thesame in a depressed position, and having means adapted to engageone of said levers to lock both of said levers against movement. 1 I 1 p 35. In a typewriting machine, the combination of a support, a carriage movable along said support, shift mechanism incld ing an arm and a rock shaft to whiclifithe arm is held, a. spring connected to saidi arrn atone end, a threaded rod connected to tlie spring at its other end, a bracket held to support for holding said rod, and a thuinli nut for adjusting said rod.

This specification signed and witnessed" this 14th day of October A. D. 1911.

' OTTO PETERMANN.

Witnesses:

Lnonm M. BACKUB, C. T. Yarns.

Copies of thil potent may be obtained for five cents each. by addressing the Commissioner of Patents.

Washington. D. C. 

